Add dart2js unittest to analyze the API.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json' as json;
 import 'dart:math';
 import 'dart:svg' as svg;
 import 'dart:web_audio' as web_audio;
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // DO NOT EDIT

[kasperl, 2013/01/15 07:25:20]

This file is generated. Editing this isn't a good idea without updating the
inputs that are used to generate it.

[Johnni Winther, 2013/01/15 07:55:41]

Didn't see that. Do you know what the inputs are?

[kasperl, 2013/01/15 08:43:48]

I think in this case it is something derived from
tools/dom/templates/immutable_list_mixin.darttemplate.

 // Auto-generated dart:html library.
 
 
 // Not actually used, but imported since dart:html can generate these objects.
 
 
 
 
 
 Window get window => JS('Window', 'window');
@@ skipping 7364 matching lines @@
         return true;
       }
     };
     return false;
   }
 
   List<Element> take(int n) {
     return new ListView<Element>(this, 0, n);
   }
 
-  Iterable<Element> takeWhile(bool test(T value)) {
+  Iterable<Element> takeWhile(bool test(value)) {
     return new TakeWhileIterable<Element>(this, test);
   }
 
   List<Element> skip(int n) {
     return new ListView<Element>(this, n, null);
   }
 
-  Iterable<Element> skipWhile(bool test(T value)) {
+  Iterable<Element> skipWhile(bool test(value)) {
     return new SkipWhileIterable<Element>(this, test);
   }
 
   Element firstMatching(bool test(Element value), {Element orElse()}) {
     return Collections.firstMatching(this, test, orElse);
   }
 
   Element lastMatching(bool test(Element value), {Element orElse()}) {
     return Collections.lastMatchingInList(this, test, orElse);
   }
@@ skipping 17407 matching lines @@
     }
     _dispatch(e);
   }
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /**
- * Defines the keycode values for keys that are returned by 
+ * Defines the keycode values for keys that are returned by
  * KeyboardEvent.keyCode.
- * 
+ *
  * Important note: There is substantial divergence in how different browsers
  * handle keycodes and their variants in different locales/keyboard layouts. We
  * provide these constants to help make code processing keys more readable.
  */
 abstract class KeyCode {
   // These constant names were borrowed from Closure's Keycode enumeration
   // class.
-  // http://closure-library.googlecode.com/svn/docs/closure_goog_events_keycodes.js.source.html  
+  // http://closure-library.googlecode.com/svn/docs/closure_goog_events_keycodes.js.source.html
   static const int WIN_KEY_FF_LINUX = 0;
   static const int MAC_ENTER = 3;
   static const int BACKSPACE = 8;
   static const int TAB = 9;
   /** NUM_CENTER is also NUMLOCK for FF and Safari on Mac. */
   static const int NUM_CENTER = 12;
   static const int ENTER = 13;
   static const int SHIFT = 16;
   static const int CTRL = 17;
   static const int ALT = 18;
@@ skipping 174 matching lines @@
    * Returns true if the keyCode produces a (US keyboard) character.
    * Note: This does not (yet) cover characters on non-US keyboards (Russian,
    * Hebrew, etc.).
    */
   static bool isCharacterKey(int keyCode) {
     if ((keyCode >= ZERO && keyCode <= NINE) ||
         (keyCode >= NUM_ZERO && keyCode <= NUM_MULTIPLY) ||
         (keyCode >= A && keyCode <= Z)) {
       return true;
     }
- 
+
     // Safari sends zero key code for non-latin characters.
     if (_Device.isWebKit && keyCode == 0) {
       return true;
     }
- 
+
     return (keyCode == SPACE || keyCode == QUESTION_MARK || keyCode == NUM_PLUS
         || keyCode == NUM_MINUS || keyCode == NUM_PERIOD ||
         keyCode == NUM_DIVISION || keyCode == SEMICOLON ||
         keyCode == FF_SEMICOLON || keyCode == DASH || keyCode == EQUALS ||
         keyCode == FF_EQUALS || keyCode == COMMA || keyCode == PERIOD ||
         keyCode == SLASH || keyCode == APOSTROPHE || keyCode == SINGLE_QUOTE ||
         keyCode == OPEN_SQUARE_BRACKET || keyCode == BACKSLASH ||
         keyCode == CLOSE_SQUARE_BRACKET);
   }
 }
@@ skipping 1865 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 // Iterator for arrays with fixed size.
 class FixedSizeListIterator<T> implements Iterator<T> {
   final List<T> _array;
   final int _length;  // Cache array length for faster access.
   int _position;
   T _current;
-  
+
   FixedSizeListIterator(List<T> array)
       : _array = array,
         _position = -1,
         _length = array.length;
 
   bool moveNext() {
     int nextPosition = _position + 1;
     if (nextPosition < _length) {
       _current = _array[nextPosition];
       _position = nextPosition;
@@ skipping 24 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }